Pedal driving-gear for velocipedes.



Patented Mar. 27, 1900. I. FAULKNEB.

No. 645,947. c

PEDAL DRIVING GEAR FOR VELOCI'PEDES.

(Application filed Aug. 8, 1899.) (No Model.) 3 Sheets-Sheet INVENTOR.

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N0. 645,947. Patented Mar. 27, I900. C. l. FAULKNER.

PEDAL DRIVINGGEAB FOR VELOGIPEDES.

(Application filed Aug. 8, 1899.) (No Model.)

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(Application filed Aug. 8, 1899.) (N o M o d 0! 3 Sheets-Sheet 3.

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UNITED STATES PATENT Fries.

CHARLES IRVINE FAULKNER, or ESORIOK, ENGLAND.

PEDAL DRIVING-GEAR FOR VELOCIPEDES.

SPECIFICATION forming part of Letters Patent No. 645,947, dated March27, 1900. Application filed August 8, 1899. Serial No. 726,602. (Nomodel.)

To all whom it may concern:

Be it known that I, CHARLES IRVINE FAULK= NER, a subject of the Queen ofGreat Britain, residing at Escrick, in the county of York, England, haveinvented a new and useful Improvement in Pedal Driving-Gear for Velooipedes, (for which I have obtained Letters Patent in Great Britain, No.624, bearing date the 10th of January, 1899,) of which the following isa full and complete specification.

This invention relates to an improved pedal driving-gear forvelooipedes; and it consists in extending the crank beyond the point atwhich the crank-pin is attached and in causing the forward part of thepedal to engage the said extension during the whole or part of theoperative part of the stroke of the crank, the object being toautomatically increase the leverage of the crank during the said part ofits stroke.

In the accompanying drawings, which show some methods of carrying thisinvention into practice, Figure l is a view in side elevation, and Fig.2 is a View in front elevation, of one form the invention may assume.Fig. 3 is a view in side elevation, and Fig. 4 is a view in plan,showing another form the invention may assume. Fig. 5 is a diagrammaticView showing the position of the pedal at four points in one completerevolution of the crank.

Similar letters refer to similar parts throughout the several views.

According to my invention the cranks A are extended beyond the points atwhich the crank-pins B are attached, and the pedals O, mounted'on thesaid pins, carry at their front ends stops or projections'D, which areadapted to engage the extensions A of the cranks during the down oroperative parts of their strokes.

In order to obtain the greatest amount of increased leverage withoutunduly increasing the length of the pedal, I prefer to mount the pedalon its pin B in such a manner that the said pin is nearer its rear baror edge 0 than its front bar or edge 0', but this is not obligatory.

It will be seen that when the stop or projection D comes into contactwith the extension A'of the crank the leverage of the crank is increasedby the distance between the front bar or edge e of the pedal and thecenter of the pedal-pin B. In order that the stop or projection D shallremain in contact with the extension A of the pedal during the effectivepart of the stroke of the crank, it is neces sary to provide that therear part of the pedal shall drop with respect to the front part duringthe first half of the down or operative part of the stroke of the crankand rise again during the remainder of the said part of the stroke,which is attained by mounting the pedal-pin on a spring or spring-armcarried by the crank.

In the construction shown by Figs. 1 and 2 of the accompanying drawingsthe crank-pin B is mounted to slide in a slot a, formed in transverseenlargements A of the crank, and rests upon a spiral or other suitablespring E, mounted in the said slot, the position shown in Fig. 1 beingapproximately that the pedal will occupy when the crank is half waythrough the down or operative part of its stroke.

In the construction shown by Figs. 3 and 4 of the accompanying drawingsthe crank-pin B is mounted on an arm or secondary crank A pivoted to thecrank A as near as possible to the point of its attachment to its axleor preferably at such point of attachment as shown, the movement of thearm with respect to thecrank being limited by interstepping the abuttingfaces of their bosses and con trolled by any suitable spring, such as E.A stop, such as a, is provided on the crank A to engage the arm A shouldthe spring E break or the pressure exerted on the rear bar 0 be greaterthan the spring E can sustain.

In order to allow the stop or projection D to pass the extension A ofthe crank durin the upward or non-effectivepart of the stroke, the saidstop or projection is so mounted on the pedal that it is free to slidetransversely with respect thereto and is kept in its extreme outwardposition by a spring, such as d, so that while it engages the extensionof the crank during the down or operative part of the throw it is pushedaside by the extension of the crank when it meets it during the up ornon-operative part of the stroke, the under side of the said extensionbeing chamfered or beveled for the purpose. As an alternativeconstruction the stop or projection on the for ward end of the pedal 0may be a fixed one,

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preferably provided with a bowl or roller D, and the extension A of thecrank be set off, as shown by Fig. 4:, so that it only engages theprojection or roller D on the down or operative part of the stroke ofthe crank.

WVhat I claim, and desire to secure by Letters Patent, is-

1. Apedal driving-gear for velocipedes consisting of a crank having anextension beyond the point of attachment of the pin carrying the pedal,of a crank-pin so attached to the crank that it has a transversemovement with respect thereto which movement is controlled by a suitablespring, of a pedal mounted on the crank-pin and of a stop or projectionmounted on the forward end of the pedal and adapted to engage theextension of the crank during the down or operative part of its stroke,as and for the purpose set forth.

2. Apedaldriving-gearforvelocipedesconr sisting of a crank having aradially-arranged slot across it and an extension beyond the said slot,of a crank-pin adapted to slide in the said slot, of a spring acting onthe crankpin so as to keep it against the upper end of the said slot, ofa pedal mounted on the said crank-pin, of a stop orprojection carried bythe forward end of the pedal and adapted to engage the extension of thecrank during the operative part of its stroke, as and for the purposeset forth.

3. Apedaldriving-gearforvelocipedes consisting of a crank having aradially-arranged slot across it and an extension beyond the said slot,of a crank-pin adapted to slide in the said slot, of a spring acting onthe crankpin to keep it against the upper end of the said slot, of apedal mounted on the said crank-pin, of a spring-controlled stop orprojection carried by the forward end of the pedal and adapted to engagethe extension of the crank during the down or operative part and to passby the said extension during the up or non-operative part of its stroke,as and for the purpose set forth.

CHARLES IRVINE FAULKNER.

\Vitnesses:

ARTHUR V. IIUnsoN, W. H. Cross.

